沈阳正规医院治脱发要多少钱(沈阳丘疹性荨麻疹的治疗方法) (今日更新中)

Researchers are trying to find out as much as they can about great white sharks.After a couple of attacks involving people last year, there are new efforts to learn more about these animals. It’s moments like the incident at Nauset Beach South that shark experts are studying more closely. Video taken of the beach shows white sharks feeding on seals close to the shore. Now, researchers are launching new studies, including one looking at the feeding habits and behaviors of these sharks. “We're essentially going to be giving iPhones to white sharks to track their activity in three dimensions at a really fine scale,” explains Megan Winton, a research scientist with the Atlantic White Shark Conservancy. Winton and other researchers will be tagging sharks with devices similar to what's in smartphones. “We'll be able to identify how often they're feeding on seals. We'll be able to look for relationships with feeding activity and environmental conditions,” Winton says. The data would be given to officials to use to provide better warnings on beaches. The Atlantic White Shark Conservancy is currently pouring over data on a population study they just finished. “Based on the video footage, we were able to identify every shark we saw to an individual level,” Winton says. So far, the researchers have identified more than 300 white sharks. Winton calls it a conservation success story, thanks to protections put in place over the last few decades. “So one thing I like to remind people is that these are large, amazing animals and they're very capable predators and they're certainly deserving of our respect,” Winton says. “But they're not monsters out there, lurking our coastline menacing our beaches. They're big fish out there eating their natural prey item.” White sharks are the only natural predator to seals in the Cape Cod area, which some residents and fisherman see as a nuisance.Researchers want to see how many seals the sharks are eating and if they can impact the seal population. 2023

A 6.0-magnitude earthquake shook Puerto Rico Monday night, striking off the coast of the island in the Atlantic Ocean.The quake hit about 49 miles north-northwest of Isabela, Puerto Rico, around 11:23 p.m. ET, according to the United States Geological Survey.At least three aftershocks have followed the quake including a magnitude 4.7, USGS said.Puerto Rico Gov. Wanda Vázquez Garced said in a tweet that there was no damage.There is no threat of tsunami from the quake, according to a tweet from The National Weather Service Pacific Tsunami Warning Center. 570

A large meteor gave St. Louis a light show for the ages Monday night.Just before 9 p.m. local time, a large fireball lit up the sky above the city and surrounding areas. The 186

A 14-hour Congressional hearing ended around 11:20 p.m. on Thursday as Judiciary Chair Jerry Nadler shocked his Republican colleagues by not calling for a vote on articles of impeachment against President Donald Trump. Nadler instead announced at the end of the hearing that he would reconvene the committee at 10 a.m. on Friday. The Republicans' ranking member on the committee, Rep. Doug Collins, called the move a "kangaroo court," as other GOP members compared Nadler to Joseph Stalin. Collins told CNN that the move to delay the vote was “the must bush league stunt I’ve ever seen in my entire life.”The hearing came to an end after the Republicans put forth five amendments to the Democrats' impeachment resolution. All five resolutions came with a round of comments by the entire committee. All five of the GOP resolutions were voted down by party-line votes. 879

San Francisco is expected to set a groundbreaking precedent on Tuesday by voting to become the first city in the country to ban police from using facial recognition. Part of the reason: concerns about accuracy. “With Caucasian faces, facial recognition is pretty good. It has a 90 to 95 percent accuracy rate,” explains Darrell West, director of the Center for Technology Innovation with the Brookings Institution. “But with minorities, sometimes the accuracy rate drops to 70 percent.”West also says that once a person’s image is in the database, there’s uncertainty surrounding what it could be used for. A Georgetown law study found 1 in 2 American adults is in a law enforcement face recognition network. Law enforcement has argued the technology helps solve crimes or improve investigations. Agencies across the country can use driver’s license photos or mug shots to match someone's identity. “All it's doing is using something that's readily available,” says Sheriff Bob Gualtieri with the Pinellas County Sheriff’s Department in Florida. But it's not just law enforcement using the technology. Stores, airports and some concert venues are all starting to work it into their operations. It's become so mainstream, Congress is now considering a bill to stop businesses from collecting facial recognition data on customers without their permission. “I think people find it very intrusive that you're just walking down the street or going into the store and somebody's recording your face and then attaching your identity to that image,” West says.If the bill in Congress passes, it would be the first federal law on facial recognition. 1656

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